1<?xml version='1.0'?> 2<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN' 3 'http://www.w3.org/TR/MathML2/dtd/xhtml-math11-f.dtd' 4 [<!ENTITY mathml 'http://www.w3.org/1998/Math/MathML'>]> 5<html xmlns='http://www.w3.org/1999/xhtml'> 6<head><title>zeta7</title> 7<!-- MathML created with MathCast Equation Editor version 0.89 --> 8</head> 9<body> 10<math xmlns="http://www.w3.org/1998/Math/MathML" display="block"> 11 <mrow> 12 <mi>ζ</mi> 13 <mfenced> 14 <mrow> 15 <mo>−</mo> 16 <mi>n</mi> 17 </mrow> 18 </mfenced> 19 <mo>=</mo> 20 <mfrac> 21 <msup> 22 <mfenced> 23 <mrow> 24 <mo>−</mo> 25 <mn>1</mn> 26 </mrow> 27 </mfenced> 28 <mi>n</mi> 29 </msup> 30 <mrow> 31 <mi>n</mi> 32 <mo>+</mo> 33 <mn>1</mn> 34 </mrow> 35 </mfrac> 36 <msub> 37 <mi>B</mi> 38 <mrow> 39 <mi>n</mi> 40 <mo>+</mo> 41 <mn>1</mn> 42 </mrow> 43 </msub> 44 <mspace width="1em"/> 45 <mo>;</mo> 46 <mspace width="1em"/> 47 <mi>n</mi> 48 <mo>∈</mo> 49 <mi>ℕ</mi> 50 </mrow> 51</math> 52</body> 53</html>